| Openings for hotel guests? |
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| Eye-level door openings |
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| Features of apartment doors |
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| Spyholes |
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| Spy rings? |
LA Times Daily |
24 Jun 2023 |
| Tweet from those on the golf course giving some insights into how those in The Houses secretly see things |
Irish Times Crosaire |
22 Oct 2020 |
| Features of most hotel doors |
New York Times |
04 May 2020 |
| Door features |
Thomas Joseph |
07 Apr 2018 |
| Openings for furtive glances |
The Washington Post |
06 Jan 2017 |
| Door features |
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| Spying apertures |
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| Spy rings? |
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| Openings for spies |
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| Apartment security devices |
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| Viewpoints? |
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